The invention relates to an ultrasonic flowmeter for measuring the flow of a medium flowing through a measuring tube. The ultrasonic flowmeter comprises at least two ultrasonic transducers and at least one control and evaluation unit. The measuring tube has an inner wall, the ultrasonic transducers are transmitters for transmitting an ultrasonic signal and/or are receivers for receiving the ultrasonic signal, and are arranged in an offset manner in the direction of flow such that the respective transmitter transmits the ultrasonic signal in the direction of flow or against the direction of flow during operation. The receiver receives the ultrasonic signal transmitted by the transmitter after at least one reflection on the inner wall of the measuring tube, wherein the ultrasonic signal hasa first signal component and at least a second signal component.